MySQL OR

The MySQL OR operator is a logical operator used to combine two or more conditions in a SQL query. It is often used in the WHERE clause of a query to filter rows based on multiple conditions. The OR operator requires that at least one of the specified conditions is true for a row to be included in the result set.

The basic syntax for using the OR operator is as follows:

SELECT columns
FROM table
WHERE condition1 OR condition2 OR ...;

Here’s how it works:

• condition1, condition2, and so on are the conditions you want to combine with the OR operator.
• If any of the specified conditions are true for a row, the row is included in the result set.
• If all the conditions are false for a row, the row is excluded from the result set.

Here are some examples to illustrate the use of the OR operator:

1. Match all records where either the category is “Electronics” or the price is greater than $500:

   SELECT *
   FROM products
   WHERE category = 'Electronics' OR price > 500;

2. Retrieve customers with the name “John” or an email that ends with “@example.com”:

   SELECT *
   FROM customers
   WHERE first_name = 'John' OR email LIKE '%@example.com';

3. Find employees who work in either the “Sales” department or have a salary greater than $50,000:

   SELECT *
   FROM employees
   WHERE department = 'Sales' OR salary > 50000;

The OR operator is a valuable tool for building complex queries that involve multiple conditions. It allows you to specify that at least one of the conditions must be met for a row to be included in the query result, making it useful for creating inclusive filters based on various criteria.